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(No Model.) W. O. FERGUSON, G,D.GRIS1VIORE 8v W. M. WETHER ILL.

310K. No. 285,804. Patented Oct. 2, 1883.

71 7222 8.9.96.9 .232 yenzars:

UNITE STATES PATENT OFFICE.

WILLIAM G. EEEGUsoN, GEORGE D. GRISMORE, AND WILLIAM M. WETH- ERILL, or sr. LoUIs, MISSOURI.

PICK.

SPECIFICATION forming part of Letters Patent No. 285,804, dated October 2, 1883.

Application filed May 16, 1882; Renewed February 10, 1883. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM C. FERGU- soN, GEORGE D. GRIsMoRE, and WILLIAM M. WETHERI L, of the city of St. Louis, in the State of Missouri,have invented a certain new and useful Improvement in Picks, of which the following is aspecification, reference being had to theaccompanying drawings, forming part of the same.

Our improvement consists in the described manner of attaching steel points to the head of a miner s or other pick.

I11 the drawings, Figure 1 is a side view of a pick of the improved construction. Fig. 2 is a top view of the removable point. Fig. 3

is a detail longitudinal section, enlarged to full size, of the tool.

The drawings represent the improvement applied to a usual form of miners pick.

The head is shown at A and the removable point at B. The head has at each end a wedge-formed recess, extending transversely from side to side, between upper and under lips, a. VVepI-efer to forin these lips with beveled or' inclined ends, as shown, for two reasons: first, that the point may be fitted to the head with a sort of dovetail joint, and, second, to cause the point to lap over the lips at these places to protect the joint from abrasion of rocks when the pick is in use. The point is made with a wedge-formed tang, b, with shoulders I), fitting the recess aforesaid and the beveled ends of the lips. The inner end, 5 of the tang b is in swallowtail form, and the recess in the head of suitable form to fit the same. Thus the cornersof the tang lap past the tongue a at the inner end of the recess, and prevent lateral movement of .the tang at this point. The lips are niortised through at a and the tang at b to admit a gib, O, and wedge or key D, by which the point is secured to the head. The wedge is driven hard home, and it is not anticipated that it will work loose; but to insure its remaining in place tersunk into the head A, and engages the we inserta set-screw, E, whose head is coun larger end of the wedge to prevent its falling loose.

In Fig. 3 the wedge is shown as riveted at its smaller end, having been spread into an enlargement at the upper end of the mortise.

It will be seen that all parts of the joint are flush, so that there-is no impediment to the entrance of the pick into the earth. While the point is held with perfect firmness in the head, it may be readily removed and another substituted. Thus when a point becomes dull or broken a new or sharp point can be attached, a stock of new orsharpened points being kept on hand, so that the pick can be always in a state of fullefficiency.

We are aware that picks have been made with removablepoints, but we are not aware of any having been made before ours with a joint flush in all its parts. Any other construction is very objectionable, because any shoulder or projection comes in contact with the earth and rocks and prevents the penetration of the pick, and where the shoulder isupon the head its impingement against any object tends forcibly to eject the point.

WVe claim as new and of our invention 1. In a pick, the combination of a removable point, made with re-entering angles at b,

and wedge-formed tang b, with forked point 12 the head with counterpartrecess fitting the tang, and gib and wedge fitting a mortise made through the tang of the point and the lips of the head, and finished off flush with the face of the lips, as set forth.

2. The combination of the head, having recess forming lips a, niortises in said lips, point having a tang, b, fitting said recess, mortise in the tang, wedge fitting in said inortises, and securing-screw E, asset forth.

WILLIAM C. FERGUSON.

GEORGE D. GRISMORE. \VILLIAM M. WETHERILL.

Witnesses:

SAML. KNIGHT, GEO. H. KNIGHT. 

